#1 deadening n. [stultification, constipation, impairment] the act of making something futile and useless (as by routine). wn
#2 deadening s. [boring, dull, ho-hum, irksome, slow, tedious, tiresome, wearisome] so lacking in interest as to cause mental weariness; "a boring evening with uninteresting people"; "the deadening effect of some routine tasks"; "a dull play"; "his competent but dull performance"; "a ho-hum speaker who couldn't capture their attention";. wn
vizzz